Reenforced pavement and method of laying the same



March 27, 1934. MQMacCHESNEY ET AL 1,952,721

REENFORCED PAVEMENT AND METHOD OF LAYING THE SAME Filed Sept. 11, 1930 3Sheets-Sheet 1 16g 16- J69 Wen/5. M5070 March 27, 1934. c MaOCHEsNEY ETAL 1,952,721

REENFORCED PAVEMENT AND METHOD OF LAYING THE SAME s Sheets-Sheet 2 FiledSept. 11 1930 r 5 1 bani/0715 Chester/Z flfizchesm 77/ B. WLLSOTZ/ March27, 1934 Q MaCCHESNEY AL 1,952,721

REENFORCED PAVEMENT AND METHOD OF LAYING THE SAME 5 Sheets-Shet 3 FiledSept. 11. 1930 Patented Mar. 27, 1934 UNITED STATES REENFORCED PAVEMENTAND METHOD OF LAYING THE SAME Chester M. MacChesney, Chicago, and AllenB. Wilson, Evanston, Ill., assignors to Acme Steel Company, Chicago,111.,

a corporation of Illinois Application'September 11, 1930, Serial No.481,150

10 Claims.

This invention relates to improvements in reenforced pavements andmethod of laying the same and the present invention is an improvementupon the inventions described and claimed in the copending applicationsof Allen B. Wilson, Serial No. 382,889, filed August 2, 1929 and ChesterM. MacChesney, Serial No. 382,924, filed August 2, 1929. In saidcopending applications, there are disclosed methods of reenforcingpavement according to which the base of the pavement is provided with ametallic reenforcing mat made up of a number of units which arepivotally connected together so that a section of the reenforeing mat ofthe desired length may be laid' down upon the base with the metallicstrips orribbons which form the units thereof presented edgewise to thebase and to thesurface of the finished pavement which results fromfilling inthe spaces of the reenforcing mat with asphalt or otherplastic paving material. Reenforced pavements of this type areparticularly adapted for use as runways in shops, factories, docks,railroad platformsand the like where the trafiic is very heavy and it isfrequently desirable to reenforce the pavement over a relatively longand narrow strip only. In many instances this long strip of reenforcedpavement forms a runway in a shop, factory or the like and, having beensuperimposed upon a previously laid floor, occupies an elevated positionwith respect to the surrounding floor or roadway surfaces. Under thesecircumstances, the trafiic frequently moves crosswise over thereenforced strip of pavement and the wheels of trucks and other vehicleshave a tendency to break down the edges'of the metallic reenforcement.

It is the principal object of the present invention to provide areenforced pavement of the general type disclosed in the above-mentionedapplications, in which improved means are provided along the edges ofthe reenforcement for permitting traffic to move crosswise over thereenforced strip without injury to the metallic reenforcement or to theconcrete asphalt or other material which forms the body of the pavement.Still another object of the invention isto provide a pavement having ametallic surface reenforcement united along its edges with metallicbuffer plates which are adapted to direct the traffic upwardly over thereenforced pavement when it moves crosswise thereof. A further object'ofthe invention is to provide 'an improved method of "reenforcingthe-pavement according to which a continuous strip of flexible metallicreenforcing material'is unrolledupon the pave- (Ol. 94-8) i ment base,then united along its edges with metallic buffer plates and then filledwith a body of plastic paving material-to cause the edges of themetallic reenforcing material to be presented m edgewise substantiallyflush with thesurfaceof the resulting pavement. Another object of theinvention is to provide a reenforced pavement comprising a metallicreenforcing mass made up of a number of units which are pivotallyconnected together and which are provided at their edges with relativelymovable pins adapted to form a connection with inclined buffer plateslocated along the edges of the metallic strip. Other objects relate tovarious features of construction H and arrangement which will appearmore fully hereinafter. V

The nature of the invention will be understood from the followingspecification taken with the accompanying drawings in which one exam- 7ple of the improved pavement and one example 7 of the improved method oflaying the same are set forth.

In the drawings, Figure 1 shows a side eleva tion of a roll of themetallic reenforcing material before it is applied to the pavement base;I

Fig. 2 shows a top plan view of a portion of the metallic reenforcingmat illustrated in Fig.

1 after it has been separated from the end of the roll; l

Fig. 3 is a perspective view of one unit of the flexible metallicreenforcing mat with one of the pins by which this unit is connected tothe next adjacent unit;

Fig. i is a perspective view of one edge portion of the metallicreenforcing mat having ap- '9 plied thereto the inclined buffer platesby which trafiic is directed upwardly over the mat;

Fig. 5 is a perspective view of one length or unit of the metallicbuffer plates;

Fig. 6 is a top plan view of one edge portion of the finished pavementafter the spaces of the metallic reenforcing mat have been filled withpaving material;

Fig. 7 shows a top plan View of the entire I width of a portion of themetallic reenforcing mat showing the reenforcement of the opposite edgesthereof by the metallic buifer plates of the present invention;

Fig. 8 shows a transverse vertical section taken on the line 8-8 of Fig.'7, and

Fig. 9 shows an enlarged detail vertical section taken on the line 9-9of Fig. 6.

As shown particularly in Figs. 1, 2 and 3, the flexible reenforcing mat15 is made up of a plurality of individual, transversely extending unitsllO' 16. Each unit 16 is formed of a sheet metal strip or ribbon whichis bent bacl: and forth upon itself in zigzag fashion to form a seriesof reversely arranged U-shaped convolutions 16 each comprising sideWalls 16 and a connecting end wall 16. The side walls 16 of one U-shapedconvolution also form two side walls of two adjacent reversely directedU-shaped convolutions. At the end of the unit 16, the metal is directedoutwardly to form tongues 16 which are, in effect, half portions of endwalls 16 These units 16 are placed together as shown in Fig. 2 so thatthe U-shaped ccnvolutions of one unit intermesh with those of the nextadjacent unit and the side walls 16 of the U-shaped convolutions areprovided with apertures 17 which are engaged by rods 18, formed of steelwire or the like, thereby establishing a pivotal connection betweenadjacent units 16 throughout the mat so that it has a flexibleconstruction and is capable of being rolled upon itself to form acylindrical roll 20 as shown in Fig. 1. The ends of the connecting rods18 are preferably transversely bent as shown at 18 but the remainingportions thereof are spaced so that any desired rod 18 may be withdrawnfrom the mat 16 by cutting off or straightening one transversely bentend when desired to separate a mat section 15 of the desired length asshown in 2 where one of the rods 18 has been withdrawn to separate asection 15 from the end of the supply roll. The lower edge of. the metalstrip which forms each unit 16 rests edgewise on the underlyingsupporting surface and the walls 16 and 16 7 of the convolutions aredirected vertically upon the supporting surface. The holes 17 aresimilarly located in all of the units 16 and are preferably disposedadjacent the lower edges thereof so that when the pivot rods 18 areinserted therein, the lower edges of the connecting unit 16 are capableof occupying one plane or of conforming to the curvature of theunderlying surface. The reenforcing material thus formed may be made upin very long lengths which can be shipped and moved about in the form ofroll 20 and then unrolled on the base of the pavement to supply thelengths or sections desired.

According to the present invention, the metallic reenforcing matdescribed above is adapted to be used on the base of the pavement withmetallic buffer plates 25 which extend along the edge of the pavement.Each buffer plate 25 comprises an inclined body portion 25 which isintegrally united at its inner edge with a downturned flange 25 The bodyportion 25 may be formed with a fiat surface, as shown in Fig. 4, andthe down-turned flange 25 is adapted to bear against the ends of theprojections 16 which are formed on the unit 16 when the mat and thebuffer plate are assembled together upon the pavement base. The bufferplate is provided along its outer lower edge with a plurality of grooves25 which extend inwardly from the outer edge of the plate and which areformed by depressing portions of the plate during the process of rollingit from hot metal. Each groove 25 has a bottom wall 25 whichis adaptedto rest upon the base of the pavement and which bottom wall is unitedintegrally with the converging side walls 25 The side walls 25 and thebottom wall 25 of each groove are united at their inner ends with thevertically extending end wall 25 which is parallel to the inner wall orflange 25 The wall 25 of each buffer plate is provided with an aperture26 located in alignment with a similar aperture 27 formed in the endwall 25 of one of the grooves 25. The aligning holes 26 and 2'7 of eachpair are adapted to receive a pin 28 which is transversely turned at itsouter end as shown at 28 and sharpened at its inner end as shown at 28*.The pin 28 is adapted to engage a number of aligning apertures 29 whichare formed in the side walls 16 of one of the units 16 adjacent thelower edge thereof so that after the metallic reenforcing mat section 15has been put in place on the pavement base, the buii'er plates 25 may bemoved into position along the edge of the mat and then the pin 28 may bepushed inwardly through the holes 27, 26 and 29 to unite-the bufferplates with the mat. In order that the buffer plates may be readilyhandled and adapted for use in any desired length, they are made up insections 25 The body portion 25 of each section is divided at one endwith 'an undercut notch 25 and at the other end it aligning apertures 29of the adjacent mat. When the pins 28 are in position, they areprevented from turning by the engagement of the trans= versely directedends 28 with the side walls 25 of the groove.

In the practice of the invention, the required length 15 of the flexiblemetallic matting is separated from the roll 20 by removing one of therods 18 and then this section of matting is laid down upon the pavementbase 30, as shown in Figs. '7 and 8 with the lower edges of the unit 16of the mat resting edgewise upon the upper surface of the base 30 whichmay be formed of concrete or of wood or other suitable material. Havinglaid the mat sections 13 in place on the base 30, the buffer plates 25are placed along o the edges thereof and formed by uniting a suitablenumber of lengths or sections 25 of the buffer plates in the mannerpreviously described. These buiier plates are located so that the pins28 may then be inserted through the holes 2'? and 26 into the aligningapertures 29 which are formed in the side walls of the mat unit. Whenthe pins 28 have been inserted, the spaces between the walls of the matunits are filled with paving material 31 which may be asphalt, mastic,concrete or other material. When this paving material 31 has hardened,the pins 28 are held firmly in place and the engagement of thetransversely extending portions 28 of these pins with the end walls 25of the grooves, then serves to maintain the buffer plates firmly inposition with walls 25 engaging the projections 16 of the mat units. Inthis way an inclined buffer plate is provided along each edge of thereenforced paving strip. It will be understood that before placing thebuffer plates 25 in place, several links of metallic reenforcing mat maybe united with each other along their edges by the practice of theinvention described and claimed in said copending application of ChesterM. MacChesney.

Although one form of the improved reenforcing material and one exampleof the improved method of laying the pavement have been set forth hereinby way of illustration, it will be understood that the method may bepracticed in various ways and that the pavement may take various formswithin the scope of the appended claims.

We claim:

1. A reenforced pavement comprising a paving base, a metallic matresting on said base, a buffer plate having a supporting surfaceextending continuously along the edge of said mat on said base, saidbuffer plate and said mat having aligning apertures therein, and aconnecting member passing through said aligning apertures transverselyto said edge of said mat.

2. A reenforced pavement comprising a paving base, a metallic matresting on said base, a buffer plate extending along the edge of saidmat on said base and having a supporting surface inclined upwardly fromsaid base to the upper edge of said mat, said buffer plate and said mathaving aligning apertures therein, a connecting member passing throughsaid aligning apertures, and reenforcing material occupying the spacesof said mat and holding said rod in place.

3. A reenforced pavement comprising a paving base, a metallicreenforcing mat resting on said base, a buffer plate resting on saidbase along the edge of said mat and having a continuous supportingsurface inclined upwardly from said base to the upper edge of said mat,and a series of detachably connecting members extending through saidbuffer plate into said mat transversely to said edge of said mat.

4-. A reenforced pavement carrying a paving base, a metallic reenforcingmat resting on said base and having a series of transversely extendingapertures along the edge thereof, a buffer plate inclined upwardlytoward the edge of said mat and having a down turned flange restingedgewise on said base adjacent said mat, and means for attaching saidbuffer plate to said mat.

5. A reenforced pavement carrying a paving base, a metallic reenforcingmat resting on said base and having a series of transversely extendingapertures along the edge thereof, a buffer plate inclined upwardlytoward the edge of said mat and having a down turned flange restingedgewise on said base adjacent said mat, said buffer plate having aninwardly extending groove with an upright apertured wall at the innerend of said groove, said flange of said buffer plate having an aperturein alignment with the aperture in said wall, and a rod extending throughsaid apertures in said buffer plate into said apertures in said mat.

6. A reenforced pavement carrying a paving base, a metallic reenforcingmat resting on said base and having a series of transversely extendingapertures along the edge thereof, a buffer plate inclined upwardlytoward the edge of said mat and having a down turned flange restingedgewise on said base adjacent said mat, said buffer plate having aninwardly extending groove with an upright apertured wall at the innerend of said groove, said flange of said buffer plate having an aperturein alignment with the aperture in said wall, and a rod extending throughsaid apertures in said buffer plate into said apertures in said mat,said rod having its outer ends bent transversely.

7. A reenforced pavement carrying a paving base, a metallic reenforcingmat resting on said base and having a series of transversely extendingapertures along the edge thereof, a buffer plate inclined upwardlytoward the edge of said mat and having a down turned flange restingedgewise on said base adjacent said mat, said buffer plate having aninwardly extending groove with an upright apertured wall at the innerend of said groove, said flange of said buffer plate having an aperturein alignment with the aperture in said wall, a rod extending throughsaid apertures in said buffer plate into said apertures in said mat,said rod having its outer ends bent transversely, and paving materialfilling the spaces of said mat.

8. A reenforced pavement comprising a paved base, a plurality ofmetallic reenforcing mat sections resting edgewise on said base andintermeshing with each other, said sections having aligning apertures,metallic members engaging said aligning apertures for pivotallyconnecting said sections, said sections having other aligning aperturesextending through the parts thereof between said members, a buffer plateresting on said base and having a support surface extending upwardlyfrom said base to the upper edge of said mat, said buffer plate havingapertures therethrough in alignment with said last named apertures insaid mat sections, and connecting members engaging said apertures insaid buffer plate and said last named apertures in said sections.

9. A reenforced pavement comprising a paving base, a reticulatedmetallic mat resting on said base, a buffer plate extending along theedge of said mat on said base and having a supporting surface inclinedupwardly from said base to the upper edge of said mat, means forsecuring said buffer plate to said mat, and paving material occupyingthe spaces of said mat substantially to the level of the upper surfacethereof.

10. A reenforced pavement comprising a paving base, a reticulatedflexible metallic mat resting on said base, a buffer plate extendingalong the edge of said mat on said base and having a supporting surfaceinclined downwardly from the upper edge of said mat to said base,connecting means engaging said buffer plate and extending into said mat,and paving material occupying the spaces of said mat and serving toanchor said connecting means in place.

CHESTER M. MACCHESNEY. ALLEN B. WILSON.

